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matrix that has 2 columns, one for each input, and one row per combination, cycling through the first field first.
It differs from expand.grid in that this returns a matrix not data.frame, only accepts two parameters creating two columns, for now,
and lacks the other parameters of expand.grid"><meta property="og:description" content="This function is similar to expand.grid, in the sense that it returns a
matrix that has 2 columns, one for each input, and one row per combination, cycling through the first field first.
It differs from expand.grid in that this returns a matrix not data.frame, only accepts two parameters creating two columns, for now,
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  <main id="main" class="col-md-9"><div class="page-header">
      <img src="../logo.svg" class="logo" alt=""><h1>utility similar to expand.grid, but returns a matrix not data.frame</h1>
      <small class="dont-index">Source: <a href="https://github.com/USEPA/EJAM/blob/HEAD/R/expand.gridMatrix.R" class="external-link"><code>R/expand.gridMatrix.R</code></a></small>
      <div class="d-none name"><code>expand.gridMatrix.Rd</code></div>
    </div>

    <div class="ref-description section level2">
    <p>This function is similar to <code><a href="https://rdrr.io/r/base/expand.grid.html" class="external-link">expand.grid</a></code>, in the sense that it returns a
matrix that has 2 columns, one for each input, and one row per combination, cycling through the first field first.
It differs from expand.grid in that this returns a matrix not data.frame, only accepts two parameters creating two columns, for now,
and lacks the other parameters of expand.grid</p>
    </div>

    <div class="section level2">
    <h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="co"># S3 method for class 'gridMatrix'</span></span>
<span><span class="fu">expand</span><span class="op">(</span><span class="va">x</span>, <span class="va">y</span><span class="op">)</span></span></code></pre></div>
    </div>

    <div class="section level2">
    <h2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h2>


<dl><dt id="arg-x">x<a class="anchor" aria-label="anchor" href="#arg-x"></a></dt>
<dd><p>required vector</p></dd>


<dt id="arg-y">y<a class="anchor" aria-label="anchor" href="#arg-y"></a></dt>
<dd><p>required vector</p></dd>

</dl></div>
    <div class="section level2">
    <h2 id="value">Value<a class="anchor" aria-label="anchor" href="#value"></a></h2>
    <p>This function returns a matrix and tries to assign colnames based on the two input parameters. If they are variables, it uses those names as colnames. Otherwise it uses "x" and "y" as colnames.</p>
    </div>
    <div class="section level2">
    <h2 id="see-also">See also<a class="anchor" aria-label="anchor" href="#see-also"></a></h2>
    <div class="dont-index"><p><code><a href="https://rdrr.io/r/base/expand.grid.html" class="external-link">expand.grid</a></code></p></div>
    </div>

    <div class="section level2">
    <h2 id="ref-examples">Examples<a class="anchor" aria-label="anchor" href="#ref-examples"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span> <span class="fu">expand.gridMatrix</span><span class="op">(</span><span class="fl">99</span><span class="op">:</span><span class="fl">103</span>, <span class="fl">1</span><span class="op">:</span><span class="fl">2</span><span class="op">)</span> </span>
<span> <span class="va">zz</span> <span class="op">&lt;-</span> <span class="fl">1</span><span class="op">:</span><span class="fl">10</span>; <span class="va">top</span> <span class="op">&lt;-</span> <span class="fl">1</span><span class="op">:</span><span class="fl">2</span></span>
<span> <span class="fu">expand.gridMatrix</span><span class="op">(</span><span class="va">zz</span>, <span class="va">top</span><span class="op">)</span> </span>
<span> </span></code></pre></div>
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